The elements spiral downwards according to their electronic structures, hence, the name "chemical helix." The tower has eight sides and so, those elements which come above and below each other on the tower share chemical properties, just as they do in the conventional periodic table. Included is an extensive minibook packed with ideas and explanations about the elements.
Helping teachers or puzzle-setters save time, this work includes self- explanatory photocopiables and explanations that provide information on the mathematics behind Sudoku puzzles. It includes 32 photocopiable master puzzles of varying difficulty, a blank for setting your own puzzles, along with 2 further puzzles of greater difficulty.
The collection features seven innovative paper gadgets that illustrate key concepts behind cipher machines. Readers will decode secret messages while gaining insights into the methods cryptographers use to safeguard information from unauthorized access. This hands-on approach combines creativity with learning, making it an engaging way to explore the world of cryptography.
The demanding challenges in this volume explore the properties of numbers and the patterns and hidden relationships which exist between them. Many of the challenges are presented in a visual or diagrammatic way with tables or charts to complete or fill in.
This beautiful model to cut out and glue together has twelve sharp spikes emerging from pentagonal cups and forming ten pairs of parallel planes, each in a different colour.
This beautiful model to cut out and glue together is the result of arranging five interpenetrating cubes in a highly symmetrical way. Each cube is printed in its own colour and so it is easy to see that exactly two cubes meet at every vertex and that there are twelve surfaces defining each face of each cube.
This beautiful model to cut out and glue together has sixty spikes, each with three faces, making 180 faces in all. It is coloured in twenty different colours each of which defines a plane surface and which is represented by nine faces. Looked at another way it has twelve clusters of five spikes showing the relationship with the dodecahedron.
One of Tarquin's all time bestsellers! Children love making these beautiful shapes which are such fun to decorate. Each model is printed on crisp white paper ready to cut out and glue together. There are at least 12 hours of enjoyment in each book and the finished models make a fine collection. There are plenty of suggestions and ideas for coloring and decoration. A fantastic way to introduce 3D geometry to children - at home or in class. Makes an excellent gift or prize! The sister book, Make Shapes 2 contains slightly more complex models.